CN108242866B - Hub motor - Google Patents
Hub motor Download PDFInfo
- Publication number
- CN108242866B CN108242866B CN201611204403.3A CN201611204403A CN108242866B CN 108242866 B CN108242866 B CN 108242866B CN 201611204403 A CN201611204403 A CN 201611204403A CN 108242866 B CN108242866 B CN 108242866B
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- China
- Prior art keywords
- stage
- planetary gear
- stage planetary
- gear
- speed reducing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
Abstract
The utility model provides a wheel hub motor, including the motor shaft, wheel hub, first outer end cover, the second outer end cover, stator and rotor, wherein wheel hub, the outer cavity of acceping is constituteed to first outer end cover and second outer end cover fixed connection, stator and rotor are acceptd in the outer cavity of acceping, still include first order planetary gear reduction mechanism and second level planetary gear reduction mechanism, first order planetary gear reduction mechanism's input is connected with the rotor, second level planetary gear reduction mechanism's output and wheel hub connection, first order planetary gear reduction mechanism's output and second level planetary gear reduction mechanism's input are connected. Because this application in-wheel motor has first order planetary gear reduction mechanism and second level planetary gear reduction mechanism, has increased the speed reduction ratio to the output torque who has increased the motor, thereby increased the efficiency platform of motor, it is stronger to adapt to different road conditions and drive power.
Description
Technical Field
The application relates to a motor, especially relates to a wheel hub motor that electric motor car was used.
Background
With the development of electric vehicle technology, higher requirements are put forward on the motor for the electric vehicle. The hub motor for the electric vehicle at present generally has the defects of small torque and narrow efficiency platform.
Content of application
To solve the above problems, it is an object of the present application to provide a motor whose output torque is large.
Therefore, according to an aspect of the present application, there is provided a hub motor, including a motor shaft, a hub, a first outer end cap, a second outer end cap, a stator, and a rotor, wherein the hub, the first outer end cap, and the second outer end cap are fixedly connected to form an outer accommodating cavity, and the stator and the rotor are accommodated in the outer accommodating cavity, characterized in that: the motor shaft is fixed, the motor shaft also comprises a first-stage planetary gear speed reducing mechanism and a second-stage planetary gear speed reducing mechanism, the input end of the first-stage planetary gear speed reducing mechanism is connected with the rotor, the output end of the second-stage planetary gear speed reducing mechanism is connected with the wheel hub, and the output end of the first-stage planetary gear speed reducing mechanism is connected with the input end of the second-stage planetary gear speed reducing mechanism, wherein the first-stage planetary gear speed reducing mechanism comprises a first-stage planetary gear, a first-stage sun gear, a planet carrier and a first-stage inner gear ring, the first-stage planetary gear is in meshing connection with the first-stage sun gear and the first-stage inner gear ring, the second-stage planetary gear speed reducing mechanism comprises a second-stage planetary gear, a second-stage sun gear and a second-stage inner gear ring, the second-stage planetary gear is in meshing, the first stage sun wheel is sleeved on the motor shaft and is coaxially and fixedly connected or in floating connection with the rotor, the second stage planetary gear is provided with a gear shaft and is the output end of the second stage planetary gear speed reducing mechanism, and the second outer end cover is fixedly connected with the gear shaft.
According to another aspect of the application, a wheel hub motor is provided, including motor shaft, wheel hub, first outer end cap, second outer end cap, stator and rotor, wherein wheel hub, first outer end cap and second outer end cap fixed connection constitute and accept the cavity outward, and stator and rotor are acceptd in the cavity of accepting outward, its characterized in that: the motor shaft is fixed, the motor shaft also comprises a first-stage planetary gear speed reducing mechanism and a second-stage planetary gear speed reducing mechanism, the input end of the first-stage planetary gear speed reducing mechanism is connected with the rotor, the output end of the second-stage planetary gear speed reducing mechanism is connected with the wheel hub, and the output end of the first-stage planetary gear speed reducing mechanism is connected with the input end of the second-stage planetary gear speed reducing mechanism, wherein the first-stage planetary gear speed reducing mechanism comprises a first-stage planetary gear, a first-stage sun gear, a planet carrier and a first-stage annular gear, the first-stage planetary gear is meshed with the first-stage sun gear and the first-stage annular gear, the second-stage planetary gear speed reducing mechanism comprises a second-stage planetary gear, a second-stage sun gear and a second-stage annular gear, the second-stage planetary gear is meshed with the second, the input end of the second-stage planetary gear speed reducing mechanism is a second-stage sun gear, the planet carrier, the second-stage sun gear and the motor shaft share the axis, and the planet carrier is meshed and sleeved on the second-stage sun gear and is fixedly connected or in floating connection with the second-stage sun gear.
According to one possible embodiment, the first stage planetary gear has a gear shaft, a first stage planetary gear bearing is arranged between the first stage planetary gear and the gear shaft, and the first stage planetary gear is fixedly connected or floatingly connected with the planet carrier through the gear shaft.
According to one possible embodiment, wherein a second stage planet gear bearing is arranged between the second stage planet gear and the gear shaft.
According to one possible embodiment, the first outer end cap is supported on the motor shaft by a first outer end cap bearing, the second outer end cap is supported on the motor shaft by a second outer end cap bearing, and two sides of the hub are fixedly connected with the first outer end cap and the second outer end cap respectively.
According to one possible embodiment, in which the rotor is supported on the motor shaft by means of a motor bearing, the stator is arranged partially or completely around the periphery of the rotor, the stator and the motor shaft being coaxial.
According to a possible implementation mode, the motor stator further comprises a stator fixing device which is accommodated in the outer accommodating cavity, the stator fixing device comprises an inner shell and an inner end cover, the inner end cover is fixedly connected with the motor shaft, the inner shell is fixedly connected with the inner end cover, and the stator is fixed in the inner shell.
According to one possible embodiment, the first-stage ring gear and the second-stage ring gear are two separately provided elements or integrally formed elements.
Because this application in-wheel motor has first order planetary gear reduction mechanism and second level planetary gear reduction mechanism, has increased the speed reduction ratio to the output torque who has increased the motor, thereby increased the efficiency platform of motor, it is stronger to adapt to different road conditions and drive power.
Drawings
Fig. 1 is a schematic cross-sectional view of a motor according to an embodiment of the present application.
Detailed Description
Preferred embodiments of the present application are described below with reference to the accompanying drawings.
Referring to fig. 1, the hub motor according to an embodiment of the present disclosure includes a motor shaft 1, a hub 6, a first outer end cover 61, a second outer end cover 62, a stator 8, and a rotor 7.
The motor shaft 1 is fixed and fixed with the frame of the electric vehicle and is positioned in the center of the hub 6, and the length of the motor shaft 1 exceeds the axial length of the rotor 7 and exceeds the axial length of the hub 6.
The hub 6, the first outer end cover 61 and the second outer end cover 62 form an outer receiving cavity 60, wherein the first outer end cover 61 is supported on the motor shaft 1 through a first outer end cover bearing 171, the second outer end cover 62 is supported on the motor shaft 1 through a second outer end cover bearing 172, two sides of the hub 6 are fixedly connected with the first outer end cover 61 and the second outer end cover 62 through screws, respectively, and therefore the hub 6, the first outer end cover 61 and the second outer end cover 62 can rotate together relative to the motor shaft 1.
The rotor 7 is supported on the motor shaft 1 through a motor bearing 21, the stator 8 is partially or completely arranged around the periphery of the rotor 7, and the rotor 7 and the stator 8 are coaxial with the motor shaft 1.
The hub motor further comprises a stator fixing device, the stator fixing device comprises an inner shell 63 and an inner end cover 64, the outer containing cavity 60 contains the inner shell 63 and the inner end cover 64 in the outer containing cavity, the inner end cover 64 is fixedly connected with the motor shaft 1 through a pin key 640, the inner shell 63 is fixedly connected with the inner end cover 64 through a screw, and the stator 8 is fixed in the inner shell 63. The motor inner case 63 has a hollow round structure and forms an inner accommodation cavity 630, and the stator 8 and the rotor 7 are disposed in the inner accommodation cavity 630. In this embodiment, adopt the inner rotor structure, can understand, in other embodiments, according to actual demand, can adopt the outer rotor structure, based on the same principle and similar relation of connection, also can realize this application in-wheel motor. According to practical requirements, the hub motor of the present application may further include an inner housing bearing 631 disposed between the inner housing 63 and the second outer cover 62.
The hub motor further comprises a first-stage planetary gear speed reducing mechanism and a second-stage planetary gear speed reducing mechanism, the first-stage planetary gear speed reducing mechanism and the second-stage planetary gear speed reducing mechanism are arranged in the containing cavity 630, and the second-stage planetary gear speed reducing mechanism is a commonly-used planetary gear speed reducing mechanism. The first-stage planetary gear speed reducing mechanism comprises a first-stage planetary gear 9, a first-stage sun gear 13, a planet carrier 10 and a first-stage annular gear 111; the second-stage planetary gear speed reduction mechanism includes the second-stage planetary gears 12, the second-stage sun gear 15, and the second-stage ring gear 112. The primary ring gear 111 and the secondary ring gear 112 are fixed or floatingly fixed to the inner case 63.
In the present embodiment, the input end (i.e., the first-stage sun gear 13) of the first-stage planetary gear reduction mechanism of the in-wheel motor is connected to the rotor 7. Specifically, first-stage sun gear 13 is sleeved on motor shaft 1 and is connected with rotor 7 coaxially in a floating manner, and rotates synchronously with rotor 7, and the noise in the operation process of the motor can be reduced by the floating connection mode between first-stage sun gear 13 and rotor 7, and it can be understood that fixed connection mode or other connection modes can be adopted between first-stage sun gear 13 and rotor 7 as long as it can ensure that first-stage sun gear 13 and rotor 7 rotate synchronously. It will be appreciated that in other embodiments, other elements of the first stage planetary reduction mechanism may be defined as inputs, such as the first stage planetary gears, depending on the actual requirements.
The first-stage planetary gear 9 is meshed with the first-stage sun gear 13 and the first-stage inner gear ring 111 and rotates along with the first-stage sun gear 13; the first-stage planetary gear 9 has a gear shaft, and a first-stage planetary gear bearing 90 is provided between the two to allow the first-stage planetary gear 9 to rotate around the gear shaft, the first-stage planetary gear 9 is fixedly or floatingly connected to the carrier 10 through the first-stage planetary gear bearing 90 and the gear shaft, and the carrier 10 is driven to rotate by the revolution of the first-stage planetary gear 9 around the first-stage sun gear 13.
The output end of the first-stage planetary gear speed reducing mechanism is a planet carrier 10, the input end of the second-stage planetary gear speed reducing mechanism is a second-stage sun gear 15, and the output end of the first-stage planetary gear speed reducing mechanism is fixedly connected or in floating connection with the input end of the second-stage planetary gear speed reducing mechanism. Specifically, the planet carrier 10, the second-stage sun gear 15 and the motor shaft 1 share the same axis, the planet carrier 10 is meshed and sleeved on the second-stage sun gear 15 and is in floating connection with the second-stage sun gear 15, so that noise in the running process of the motor can be reduced, and it can be understood that a fixed connection mode can be adopted between the second-stage sun gear 15 and the planet carrier 10. The second-stage sun gear 15 is rotatably sleeved on the motor shaft 1, and the planet carrier 10 drives the second-stage sun gear 15 to rotate.
The output end of the second-stage planetary gear speed reducing mechanism (the gear shaft 121 of the second-stage planetary gear 12) is connected with the hub 6 through the second outer end cover 62, and the high-speed rotation of the rotor is decelerated twice through the first-stage planetary gear speed reducing mechanism and the second-stage planetary gear speed reducing mechanism, so that the hub 6 is driven to rotate. Specifically, the second-stage planetary gears 12 are meshed with the second-stage sun gear 15 and the second-stage ring gear 112, and rotate with the second-stage sun gear 15. The second-stage planetary gear 12 has a gear shaft 121 with a second-stage planetary gear bearing 120 disposed therebetween so that the second-stage planetary gear 12 can rotate on its own axis about the gear shaft 121. The second outer end cover 62 is fixedly connected with the gear shaft 121 through a screw 621, and the revolution of the second-stage planetary gear 12 around the second-stage sun gear 15 drives the second outer end cover 62 to rotate, so as to drive the hub 6 to rotate. It will be appreciated that in other embodiments, other elements of the second stage planetary reduction mechanism, such as the second stage sun gear, are defined as outputs, depending on the actual requirements.
In this embodiment, in other embodiments, the first-stage ring gear 111 and the second-stage ring gear 112 are two separately provided elements. It is understood that the first-stage ring gear 111 and the second-stage ring gear 112 may be replaced by a wider ring gear that the first-stage planetary gear reduction mechanism and the second-stage planetary gear reduction mechanism share according to actual requirements, so as to reduce the number of parts of the in-wheel motor.
When the hub motor works, the stator 8 generates a magnetic field after being electrified, and the rotor 7 operates under the action of the magnetic field, so that the first-stage sun gear 13 is driven to rotate, the first-stage planetary gear 9 is driven to rotate around the gear shaft of the first-stage planetary gear and revolve around the first-stage sun gear 13, and the output rotating speed of the rotor 7 is reduced. Because the planet carrier 10 is fixedly or in floating connection with the first-stage planetary gear 9, the revolution of the first-stage planetary gear 9 around the first-stage sun gear 13 drives the planet carrier 10 to rotate. The rotating carrier 10 further rotates the second stage sun gear 15, and the torque of the second stage sun gear 15 is transmitted to the second stage planetary gears 12 engaged therewith, causing the second stage planetary gears 12 to rotate and revolve around the second stage sun gear 15, thereby again reducing the output rotation speed of the rotor 7. Because the second outer end cover 62 is fixedly connected with the gear shaft of the second-stage planetary gear 12, the second-stage planetary gear 12 revolves around the second-stage sun gear 15, and the second outer end cover 62 is driven to rotate, so that the hub 6 is driven to rotate.
In addition, the hub motor of the present application further includes a first sealing member 101 for sealing a gap between the first outer end cap 61 and the motor shaft 1 in a manner well known to those skilled in the art; a second sealing member 102 for sealing a gap between the second outer cover 62 and the motor shaft 1 in a manner well known to those skilled in the art; and a limiting member 103 abutting against an axial end of the second stage sun gear 15 for limiting a position of the second stage sun gear 15 on the motor shaft 1. It is understood that a spacer 104 may be disposed between the axial end of the second stage sun gear 15 and the stopper 103.
Because this application in-wheel motor has first order planetary gear reduction mechanism and second level planetary gear reduction mechanism, has increased the speed reduction ratio to the output torque who has increased the motor, thereby increased the efficiency platform of motor, it is stronger to adapt to different road conditions and drive power.
While the foregoing describes certain embodiments, these embodiments are presented by way of example only, and are not intended to limit the scope of the present application. The appended claims and their equivalents are intended to cover all modifications, substitutions and changes made within the scope and spirit of this application.
Claims (8)
1. The utility model provides a wheel hub motor, includes motor shaft (1), wheel hub (6), first outer end cap (61), second outer end cap (62), stator (8) and rotor (7), and wherein wheel hub (6), first outer end cap (61) and second outer end cap (62) fixed connection constitute and accept cavity (60) outward, and stator (8) and rotor (7) are acceptd in outside accepting cavity (60), its characterized in that: the motor shaft (1) is fixed, the motor shaft further comprises a first-stage planetary gear speed reducing mechanism and a second-stage planetary gear speed reducing mechanism, the input end of the first-stage planetary gear speed reducing mechanism is connected with the rotor (7), the output end of the second-stage planetary gear speed reducing mechanism is connected with the hub (6), the output end of the first-stage planetary gear speed reducing mechanism is connected with the input end of the second-stage planetary gear speed reducing mechanism, wherein the first-stage planetary gear speed reducing mechanism comprises a first-stage planetary gear (9), a first-stage sun gear (13), a planet carrier (10) and a first-stage inner gear ring (111), the first-stage planetary gear (9) is meshed with the first-stage sun gear (13) and the first-stage inner gear ring (111), the second-stage planetary gear speed reducing mechanism comprises a second-stage planetary gear (12), a second-stage sun gear (15) and a second-stage inner gear ring (112), the second-stage planetary gear (12), the first-stage sun gear (13) is the input end of the first-stage planetary gear speed reducing mechanism, the first-stage sun gear (13) is sleeved on the motor shaft (1) and is coaxially and fixedly connected or in floating connection with the rotor (7), the second-stage planetary gear (12) is provided with a gear shaft (121) and is the output end of the second-stage planetary gear speed reducing mechanism, and the second outer end cover (62) is fixedly connected with the gear shaft (121).
2. The utility model provides a wheel hub motor, includes motor shaft (1), wheel hub (6), first outer end cap (61), second outer end cap (62), stator (8) and rotor (7), and wherein wheel hub (6), first outer end cap (61) and second outer end cap (62) fixed connection constitute and accept cavity (60) outward, and stator (8) and rotor (7) are acceptd in outside accepting cavity (60), its characterized in that: the motor shaft (1) is fixed, the motor shaft further comprises a first-stage planetary gear speed reducing mechanism and a second-stage planetary gear speed reducing mechanism, the input end of the first-stage planetary gear speed reducing mechanism is connected with the rotor (7), the output end of the second-stage planetary gear speed reducing mechanism is connected with the hub (6), the output end of the first-stage planetary gear speed reducing mechanism is connected with the input end of the second-stage planetary gear speed reducing mechanism, wherein the first-stage planetary gear speed reducing mechanism comprises a first-stage planetary gear (9), a first-stage sun gear (13), a planet carrier (10) and a first-stage inner gear ring (111), the first-stage planetary gear (9) is meshed with the first-stage sun gear (13) and the first-stage inner gear ring (111), the second-stage planetary gear speed reducing mechanism comprises a second-stage planetary gear (12), a second-stage sun gear (15) and a second-stage inner gear ring (112), the second-stage planetary gear (12), the output end of the first-stage planetary gear speed reducing mechanism is a planet carrier (10), the input end of the second-stage planetary gear speed reducing mechanism is a second-stage sun gear (15), the planet carrier (10), the second-stage sun gear (15) and the motor shaft (1) share the axis, and the planet carrier (10) is meshed and sleeved on the second-stage sun gear (15) and is fixedly connected or connected with the second-stage sun gear (15) in a floating mode.
3. The in-wheel motor according to claim 1 or 2, characterized in that the first stage planetary gear (9) has a gear shaft, a first stage planetary gear bearing is arranged between the first stage planetary gear (9) and the gear shaft, and the first stage planetary gear (9) is fixedly connected or floatingly connected with the planet carrier (10) through the gear shaft.
4. The in-wheel motor according to claim 3, characterized in that a second stage planet gear bearing (120) is arranged between the second stage planet gear (12) and the gear shaft (121).
5. The in-wheel motor according to claim 3, characterized in that the first outer end cover (61) is supported on the motor shaft (1) by a first outer end cover bearing (171), the second outer end cover (62) is supported on the motor shaft (1) by a second outer end cover bearing (172), and both sides of the hub (6) are fixedly connected with the first outer end cover (61) and the second outer end cover (62), respectively.
6. A hub motor according to claim 3, wherein the rotor (7) is supported on the motor shaft (1) by means of a motor bearing (21), the stator (8) is arranged partly or completely around the periphery of the rotor (7), and the rotor (7) and the stator (8) are concentric with the motor shaft (1).
7. The in-wheel motor according to claim 3, further comprising a stator fixing device, which is accommodated in the outer accommodating cavity (60), wherein the stator fixing device comprises an inner housing (63) and an inner end cover (64), the inner end cover (64) is fixedly connected with the motor shaft (1), the inner housing (63) is fixedly connected with the inner end cover (64), and the stator (8) is fixed in the inner housing (63).
8. The in-wheel motor according to claim 3, characterized in that the first stage ring gear (111) and the second stage ring gear (112) are two separately provided elements or integrally formed elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611204403.3A CN108242866B (en) | 2016-12-23 | 2016-12-23 | Hub motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611204403.3A CN108242866B (en) | 2016-12-23 | 2016-12-23 | Hub motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108242866A CN108242866A (en) | 2018-07-03 |
| CN108242866B true CN108242866B (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611204403.3A Active CN108242866B (en) | 2016-12-23 | 2016-12-23 | Hub motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN108242866B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023108920A1 (en) * | 2021-12-16 | 2023-06-22 | 广东威灵电机制造有限公司 | In-wheel motor and electric bicycle |
| CN115001170B (en) * | 2022-06-10 | 2023-11-21 | 江苏华源防爆电机有限公司 | Hub motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6674204B1 (en) * | 2002-11-11 | 2004-01-06 | Sunonwealth Electric Machine Industry Co., Ltd. | Magnet-positioning device for rotor |
| CN201781372U (en) * | 2010-09-16 | 2011-03-30 | 翁林华 | Hub motor of electric bicycle |
| CN202127332U (en) * | 2011-07-22 | 2012-01-25 | 重庆阿尔迪机电技术开发有限公司 | Hub motor |
| CN105257787A (en) * | 2015-10-26 | 2016-01-20 | 重庆望江工业有限公司 | Power-dividing type gearbox structure used for wind turbine generator |
-
2016
- 2016-12-23 CN CN201611204403.3A patent/CN108242866B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6674204B1 (en) * | 2002-11-11 | 2004-01-06 | Sunonwealth Electric Machine Industry Co., Ltd. | Magnet-positioning device for rotor |
| CN201781372U (en) * | 2010-09-16 | 2011-03-30 | 翁林华 | Hub motor of electric bicycle |
| CN202127332U (en) * | 2011-07-22 | 2012-01-25 | 重庆阿尔迪机电技术开发有限公司 | Hub motor |
| CN105257787A (en) * | 2015-10-26 | 2016-01-20 | 重庆望江工业有限公司 | Power-dividing type gearbox structure used for wind turbine generator |
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| Publication number | Publication date |
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| CN108242866A (en) | 2018-07-03 |
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